Searches for the baryon- and lepton-number violating decays B^0 → ∧^+_c l^-, B^-∧l^-, and B^- → ∧1^-

Creators: del Amo Sanchez, P.; Cheng, C. H.; Doll, D. A.; Echenard, B.; Hitlin, D. G.; Ongmongkolkul, P.; Porter, F. C.; Rakitin, A. Y.; BaBar Collaboration

Abstract

Searches for B mesons decaying to final states containing a baryon and a lepton are performed, where the baryon is either Λ_c or Λ and the lepton is a muon or an electron. These decays violate both baryon and lepton number and would be a signature of physics beyond the standard model. No significant signal is observed in any of the decay modes, and upper limits in the range (3.2–520)×10^(-8) are set on the branching fractions at the 90% confidence level.

Additional Information

© 2011 American Physical Society. Received 20 January 2011; published 13 May 2011. We are grateful for the excellent luminosity and machine conditions provided by our PEP-II colleagues, and for the substantial dedicated effort from the computing organizations that support BABAR. The collaborating institutions wish to thank SLAC for its support and kind hospitality. This work is supported by DOE and NSF (U.S.), NSERC (Canada), CEA and CNRS-IN2P3 (France), BMBF and DFG (Germany), INFN (Italy), FOM (The Netherlands), NFR (Norway), MES (Russia), MICIIN (Spain), STFC (United Kingdom). Individuals have received support from the Marie Curie EIF (European Union), the A. P. Sloan Foundation (U.S.), and the Binational Science Foundation (U.S.-Israel).

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